Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1424ceb710247c…

MALICIOUS

PDF

34.3 KB Created: 2020-09-16 23:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6e5e65322297e2f72b5c4cbcb5eefd8 SHA-1: 75ed5e72dda610be8913e86de5ddae7319c6a524 SHA-256: 0a1424ceb710247c9d0fe5de53047d732947b877a918f615262652a888a332f6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector and others forming a link farm. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for SEO spam or phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/wix?keyword=a+duck+has+an+adventure+2
    • http://putoxosug.globalprayernyc.org/uploads/1/3/1/6/131636725/678480.pdf
    • http://files.crashgem.com/uploads/1/3/1/4/131437685/1406f2b7d0a9ae9.pdf
    • http://puver.ayrshirejudoclub.co.uk/uploads/1/3/0/8/130874431/493b3a3b31985.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://321eb1b9-c67f-4904-b995-8d842acb872b.filesusr.com/ugd/592671_0fa7ce196bbf46d88062fb9f4a9ae5ab.pdf?index=true
    • https://6f751136-ec3b-4e9a-9155-099eefa901c0.filesusr.com/ugd/a382ee_6a012aeddeb8492487028a52d9024cc1.pdf?index=true
    • https://c00501cf-1328-4ddb-8c1a-c10d4eb98f0c.filesusr.com/ugd/8ba634_b52b1bcb9581494a8fa81b4424e20298.pdf?index=true
    • https://b7800144-0047-4eb7-95f1-2dc2cab3e4f1.filesusr.com/ugd/c638b7_f405d437d6ad4006bb6a76ccaa0e81ee.pdf?index=true
    • https://de6c0b3b-26b3-408f-8a1c-b224ab8bb65a.filesusr.com/ugd/451a43_b98c307015384e3392b73c03062c9734.pdf?index=true
    • https://e3ac16a4-52d6-47eb-9a26-2d073061dad8.filesusr.com/ugd/04c368_91fb56d699e44992b9173de6d24119ce.pdf?index=true
    • https://efd952a7-c935-4869-954c-f97aa7a205a5.filesusr.com/ugd/5f5755_0c68f389f51a4152af42cf1964763597.pdf?index=true
    • https://f976b512-1684-42df-93e5-b52527bf0644.filesusr.com/ugd/0010c8_ffe710fcba264f40bb813cf79535a00b.pdf?index=true
    • https://d561861b-7ba0-4cba-9a88-babc1da344ca.filesusr.com/ugd/8f6098_4bddd03c53c24a66a5e55b0b9aa0fdab.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/crappie_fishing_guides_in_oklahoma.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/daroroveruv.pdf
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/bastian_steel_lelah_mp4.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048fc.bin
97d36f47057d506a4b1573da4fac30edd0304b2e0304584959a64aff2366e7c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48FC 5240 bytes
font_01_sfnt_off00005ad2.bin
1b7d16fb4fd02448980258e198d7e1ba4ce33575733266750baac562723c102a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD2 10000 bytes

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